skimming
Diverting surface water by means of a shallow overflow crest to avoid diverting sand, silt, or other debris carried as bed load.
Authorization Path: 2.4.5.2.20.15
Diverting surface water by means of a shallow overflow crest to avoid diverting sand, silt, or other debris carried as bed load.
Authorization Path: 2.4.5.2.20.15